# Events & Things To Do in Longmont In September 2026 | AllEvents

- **Subtitle**: Find events and things to do in September 2026 in Longmont. Discover parties, concerts, meets, shows, sports, club, reunion, Performance happening in September 2026 in Longmont.
- **Category**: September
- **Display Name**: Events in September
- **Type**: time_filter

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## About

Here’s your guide to all the happening concerts, festivals and events in September 2026 in [CITY]. Catch the best of everything that your city has to offer here. Right from the flea market events to all the festivals; the September [YEAR] events in [CITY] is all curated and sorted for you. Get going, buy your tickets and register to all the fun and exciting events already!

## September Events in Longmont

- **Event Name**: FREE Longmont Home Show, September 2026
  - **Description**: FREE ADMISSION The Longmont Home Show is taking place September 4-6 2026 at the Boulder County Fairgrounds Why YOU Will Love the Home Show • HUGE SAVINGS — Take advantage of exclusive show-only deals from trusted local experts!
  - **Date**: Fri Sep 04 2026 at 12:00 pm – Sun Sep 06 2026 at 04:00 pm (-06:00)
  - **Event URL**: https://allevents.in/longmont/free-longmont-home-show-september-2026-tickets/80002304607639
  - **Venue**: Boulder County Fairgrounds Campground
  - **Banner**: https://cdn-ip.allevents.in/s/rs:fill:500:250/g:sm/sh:100/aHR0cHM6Ly9jZG4yLmFsbGV2ZW50cy5pbi90aHVtYnMvdGh1bWI2OTFlMmYyNjA1ZDhlLmpwZw.avif
  - **Price**: Free
  - **Categories**: exhibitions, art
- **Event Name**: Boulder County Ski & Outdoor Expo, September 2026
  - **Description**: The Boulder County Ski & Outdoor Expo is taking place September 11-13, 2026 at The Ranch Events ComplexJoin us for a weekend of fun & adventure at our Ski & Outdoors Expo — the definitive gathering for outdoor lovers
  - **Interested Audience**:
    - Count: 1
  - **Date**: Fri Sep 18 2026 at 12:00 pm – Sun Sep 20 2026 at 04:00 pm (-06:00)
  - **Event URL**: https://allevents.in/longmont/boulder-county-ski-andamp;-outdoor-expo-september-2026/80001490026540
  - **Venue**: Boulder County Fairgrounds
  - **Banner**: https://cdn-ip.allevents.in/s/rs:fill:500:250/g:sm/sh:100/aHR0cHM6Ly9jZG4yLmFsbGV2ZW50cy5pbi90aHVtYnMvdGh1bWI2OTJhMDgxOWRkNWZkLmpwZw.avif
  - **Categories**: trips-adventures, business, exhibitions, sports, camping, workshops, trekking
- **Event Name**: Oktoberfest Sprint Triathlon
  - **Description**: The annual Oktoberfest Triathlon is the party of the season! As the leaves change color this race will officially end the Colorado Triathlon Season! It's been a long fun year, but before the snow begins to fall let's get one more triathlon celebration in.
  - **Interested Audience**:
    - Count: 35
  - **Date**: Sun Sep 20 2026 at 08:15 am (-06:00)
  - **Event URL**: https://allevents.in/longmont/oktoberfest-sprint-triathlon/200029125573257
  - **Venue**: Union Reservoir
  - **Banner**: https://cdn-ip.allevents.in/s/rs:fill:500:250/g:sm/sh:100/aHR0cHM6Ly9jZG4tYXouYWxsZXZlbnRzLmluL2V2ZW50czgvYmFubmVycy80YjFjNDc2YjhlNjBiZjkxNTVhNGQyMWU2OWU0MDJlZWExNjhlNGZjODcyOWU3NmZkYzU3NDYwYTk0MWEwZjM3LXJpbWctdzEyMDAtaDYyNy1kY2Y4YjA5Zi1nbWlyP3Y9MTc3NTY5OTYwMQ.avif
  - **Categories**: sports, cycling, marathons, parties, entertainment
- **Event Name**: Flamingo – 2.5 Hr Watercolor Lesson (Ages 12+)
  - **Description**: Join me for an engaging and educational Watercolor Workshop designed for teens and adults, ages 12 and up!About this EventWatercolor Workshop for Youth & Adults (Ages 12+)Join
  - **Date**: Fri Sep 18 2026 at 11:30 am – Fri Sep 18 2026 at 02:00 pm (-06:00)
  - **Event URL**: https://allevents.in/longmont/flamingo-25-hr-watercolor-lesson-ages-12/100001986374915845
  - **Venue**: The Tilted Brick
  - **Banner**: https://cdn-ip.allevents.in/s/rs:fill:500:250/g:sm/sh:100/aHR0cHM6Ly9jZG4tYXouYWxsZXZlbnRzLmluL2V2ZW50czMvYmFubmVycy80MTNiNGNiZTJlNzU2MzlhMjRkZDUxNDBjNjdkZjQ4MGVjNDA0OWQ4ZDIwZDM2NjU2OWQ0MmNkM2U0Mzg1MDE3LXJpbWctdzEyMDAtaDYwMC1kY2ZlZmVmZS1nbWlyLmpwZz92PTE3NzU0NTM5NjU.avif
  - **Price**: USD 55
  - **Categories**: workshops, art, fine-arts

## Trending Events in Longmont

- **Event Name**: Longmont Celebrates Cinco de Mayo 2026
  - **Description**: Longmont Celebrates Cinco De Mayo invites you to join us for food, music, and more. Free to the public, sales for booth spaces only.About this EventThe Cinco de Mayo Planning Committee cordially invites you to be part of
  - **Venue**: Roosevelt Park
  - **Banner**: https://cdn-az.allevents.in/events1/banners/18bd789c5fedd2900a1b074212e716ac4db96c0048f66d4fd89f2eeea909b1d4-rimg-w949-h535-dc020103-gmir.jpg?v=1769347023
- **Event Name**: Axe After Dark
  - **Description**: AXE AFTER DARK 🖤 First Friday of Every Month 📍 Axe Me Out ⏰ 7PM – 11PM21+ NIGHT 🍻 DRINK • 🪓 THROW • 🎧 DANCE • 💉 PIERCINGS🔥 NO COVER CHARGE ⚡ Res
  - **Venue**: Axe Me Out
  - **Banner**: https://cdn2.allevents.in/thumbs/thumb69e14b2584246.jpg
- **Event Name**: Bloomgrass Festival 2026
  - **Description**: Bloomgrass is a two-day bluegrass celebration rooted in music, community, and connection on Mother’s Day weekend at Wibby Brewing Co.About this EventWelcome to Bloomgrass Festival 2026!Join us for the inaugur
  - **Venue**: Wibby Brewing
  - **Banner**: https://cdn-az.allevents.in/events9/banners/27cf5c69ecb7bbcc99e69c19f40f358345f73e0b538cba5666763f92d7a8f3ee-rimg-w1200-h1200-dcb0d3fe-gmir.jpg?v=1771794943
- **Event Name**: Strawberry Festival Vintage & Antique Market
  - **Description**: 🍓 Join Us for the 54th Annual Strawberry Festival Vintage & Antique Market! 🍓Mark your calendars for May 16–17, 2026—the treasure hunt of the season returns! Hosted by St. Vrain Historical Society in the heart of Longmont, this beloved tradition bring
  - **Venue**: Boulder County Fairgrounds Exhibit Building
  - **Banner**: https://cdn-az.allevents.in/events10/banners/ce6c8fd839e1d644949251805eeeaab258309649d1cd4d75297111979e4ae6e8-rimg-w1200-h628-dcffffff-gmir?v=1776282104
- **Event Name**: First Friday Makers' Markets on Fourth Ave
  - **Description**: A FREE Family & Dog Friendly market series showcasing games, music, food trucks, local alcohol vendors, makers, artists, and small businesses while creating a welcoming, walkable, dog and family-friendly event.  Our goal is to encourage people to gath
  - **Venue**: 667 4th Ave, Longmont, CO 80501-5401, United States
  - **Banner**: https://cdn-az.allevents.in/events3/banners/b2214d5e1a0034716c94f654e1d059d8744d85f1eeeb2407903fe79133c21f45-rimg-w1200-h1600-dcd8d8d6-gmir?v=1776075408
- **Event Name**: Shakedown Street: Run for the Roses, Derby Day Soirée
  - **Description**: SOIREE ALL DAY! Wibby Brewing is grateful to present our dear friends from Shakedown Street for your annual Run for the Roses, Derby Day Soirée!

Soft Doors All Day | Headlinerat *5:30PM *upon conclusion of the Kentucky Derby race.

Our Annual Derby Day S
  - **Venue**: Wibby Brewing
  - **Banner**: https://cdn-az.allevents.in/events8/banners/15772428e0374e4122cb523c70e1c7c99a35154b81bde972bfb49ec0f2f2ddf2-rimg-w1200-h675-dca89076-gmir?v=1776203892
- **Event Name**: FREE Longmont Home Show, May 2026
  - **Description**: FREE ADMISSION
The Longmont Home Show is taking place May 22–24 2026 at the Boulder County Fairgrounds
Why YOU Will Love the Home Show
• HUGE SAVINGS — Take advantage of exclusive show-only deals from trusted local experts!
• LIVE DEMOS — See demonstratio
  - **Venue**: Boulder County Fairgrounds Campground
  - **Banner**: https://cdn2.allevents.in/thumbs/thumb68769b6c60c69.jpg
- **Event Name**: FREE Longmont Home Show, September 2026
  - **Description**: FREE ADMISSION The Longmont Home Show is taking place September 4-6 2026 at the Boulder County Fairgrounds Why YOU Will Love the Home Show • HUGE SAVINGS — Take advantage of exclusive show-only deals from trusted local experts!
  - **Venue**: Boulder County Fairgrounds Campground
  - **Banner**: https://cdn2.allevents.in/thumbs/thumb691e2f2605d8e.jpg
- **Event Name**: Spring al Fresco Market and Downtown Sidewalk Sale
  - **Description**: Spring al Fresco is back and located on 5th Avenue and Main St! Shop local art, handmade goods, and stroll up and down Main Street to catch those sidewalk sales!
  - **Venue**: Longmont Creative District
  - **Banner**: https://cdn-az.allevents.in/events8/banners/b171c3c6dcd9bcf3f892e0c688d3e4e8ed5d542ec61568a4d8ea6221dfe5634b-rimg-w1200-h1499-dcaeaeaa-gmir?v=1775956571

## Browse September Events by Date

- [September Events Today in Longmont](https://allevents.in/longmont/september--today)
- [September Events This Weekend in Longmont](https://allevents.in/longmont/september--this-weekend)
- [September Events in April in Longmont](https://allevents.in/longmont/september--april)
- [September Events in May in Longmont](https://allevents.in/longmont/september--may)

## FAQs

- **Q**: What are the top September events in Longmont?
  - **A:** FREE Longmont Home Show, September 2026 (Fri Sep 04 2026 at 12:00 pm at Boulder County Fairgrounds Campground), Boulder County Ski & Outdoor Expo, September 2026 (Fri Sep 18 2026 at 12:00 pm at Boulder County Fairgrounds), Oktoberfest Sprint Triathlon (Sun Sep 20 2026 at 08:15 am at Union Reservoir), Flamingo – 2.5 Hr Watercolor Lesson (Ages 12+) (Fri Sep 18 2026 at 11:30 am at The Tilted Brick).
- **Q**: What are the top free September events in Longmont?
  - **A:** FREE Longmont Home Show, September 2026 (Fri Sep 04 2026 at 12:00 pm at Boulder County Fairgrounds Campground).
- **Q**: How can I find September events in Longmont?
  - **A:** You can discover upcoming September events in Longmont on AllEvents.in. Browse by date, venue, or price to find events that match your interests.
- **Q**: How do I buy tickets for September events in Longmont?
  - **A:** You can buy tickets directly through AllEvents.in. Many events offer online booking with options for free, paid, and early-bird tickets.
- **Q**: What are the popular venues for September events in Longmont?
  - **A:** Some popular venues hosting September events in Longmont include Boulder County Fairgrounds Campground, Boulder County Fairgrounds, Union Reservoir.
- **Q**: What is the price range for September events in Longmont?
  - **A:** Prices for September events in Longmont range from USD 55 to USD 55. Many events also offer free entry.
- **Q**: Who are the top organizers for September events in Longmont?
  - **A:** Popular organizers hosting September events in Longmont include Nationwide Expos, Without Limits Productions, Fine Art by Kristi Arzola.
- **Q**: Are there any online September events available?
  - **A:** Yes, many September events are available online. You can filter for virtual events on AllEvents.in to attend from anywhere.
- **Q**: How can I get notified about new September events in Longmont?
  - **A:** Follow the September category on AllEvents.in to get notified when new September events are listed in Longmont.

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## Events in September from nearby cities

- [Events in September in Erie](https://allevents.in/erie-co/september)
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- [Events in September in Dacono](https://allevents.in/dacono/september)
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- [Events in September in Boulder](https://allevents.in/boulder/september)
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